New issue by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/issues/25866

Description:
```make
cc  -DHAVE_MKSTEMP -DHAVE_FILE64 -DHAVE_FSEEKO -DHAVE_MKSTEMP64 -DHAVE_FONTCONFIG  -DHAVE_SETLOCALE  -DHAVE_DBUS -DHAVE_BSWAP32 -DHAVE_BYTESWAP_H -DHAVE_STRERROR -DHAVE_ISNAN -DHAVE_ISINF  -DHAVE_PREAD_PWRITE=1 -DGS_RECURSIVE_MUTEXATTR=PTHREAD_MUTEX_RECURSIVE -fPIC   -O2 -DNDEBUG -Wall -Wstrict-prototypes -Wundef -Wmissing-declarations -Wmissing-prototypes -Wwrite-strings -fno-strict-aliasing -Werror=declaration-after-statement -fno-builtin -fno-common -Werror=return-type -DHAVE_STDINT_H=1 -DHAVE_DIRENT_H=1 -DHAVE_SYS_DIR_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_TIMES_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_LIBDL=1 -DGX_COLOR_INDEX_TYPE="unsigned long long" -D__USE_UNIX98=1  -fstack-clash-protection -D_FORTIFY_SOURCE=2 -mtune=i686 -O2 -pipe   -g -DHAVE_RESTRICT=1 -DUSE_LIBPAPER  -fno-strict-aliasing -DHAVE_POPEN_PROTO=1 -DGS_DEVS_SHARED -DGS_DEVS_SHARED_DIR=\"/usr/lib32/ghostscript/9.53.3\"   -I./obj -I./base -I./devices  -DWHICH_CMS="lcms2" -o ./obj/gxsample.o -c ./base/gxsample.c
./base/fapi_ft.c:128:1: warning: return type defaults to 'int' [-Wimplicit-int]
  128 | FT_CALLBACK_DEF(void *)
      | ^~~~~~~~~~~~~~~
./base/fapi_ft.c:128:1: warning: no previous prototype for 'FT_CALLBACK_DEF' [-Wmissing-prototypes]
./base/fapi_ft.c: In function 'FT_CALLBACK_DEF':
./base/fapi_ft.c:129:1: error: expected declaration specifiers before 'FF_alloc'
  129 | FF_alloc(FT_Memory memory, long size)
      | ^~~~~~~~
```